88 lines
3.2 KiB
JavaScript
88 lines
3.2 KiB
JavaScript
/**
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* Copyright 2013, 2015 Kris Daniels, IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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var pg=require('pg');
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var named=require('node-postgres-named');
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var querystring = require('querystring');
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function PostgresDatabaseNode(n) {
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RED.nodes.createNode(this,n);
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this.hostname = n.hostname;
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this.port = n.port;
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this.db = n.db;
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this.user = this.credentials.user;
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this.password = this.credentials.password;
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}
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RED.nodes.registerType("postgresdb",PostgresDatabaseNode,{
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credentials: {
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user: {type:"text"},
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password: {type: "password"}
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}
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});
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function PostgresNode(n) {
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RED.nodes.createNode(this,n);
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this.topic = n.topic;
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this.postgresdb = n.postgresdb;
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this.postgresConfig = RED.nodes.getNode(this.postgresdb);
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this.sqlquery = n.sqlquery;
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this.output = n.output;
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var node = this;
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if(this.postgresConfig)
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{
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var conString = 'postgres://'+this.postgresConfig.user +':' + this.postgresConfig.password + '@' + this.postgresConfig.hostname + ':' + this.postgresConfig.port + '/' + this.postgresConfig.db;
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node.clientdb = new pg.Client(conString);
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named.patch(node.clientdb);
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node.clientdb.connect(function(err){
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if(err) { node.error(err); }
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else {
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node.on('input',
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function(msg){
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if(!msg.queryParameters) msg.queryParameters={};
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node.clientdb.query(msg.payload,
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msg.queryParameters,
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function (err, results) {
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if(err) { node.error(err); }
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else {
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if(node.output)
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{
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msg.payload = results.rows;
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node.send(msg);
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}
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}
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});
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});
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}
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});
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} else {
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this.error("missing postgres configuration");
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}
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this.on("close", function() {
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if(node.clientdb) node.clientdb.end();
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});
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}
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RED.nodes.registerType("postgres",PostgresNode);
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}
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